CVE-2026-74693
In the Linux kernel, the following vulnerability has been resolved:
net: prestera: validate firmware header length
prestera_fw_hdr_parse() reads the firmware header before checking
that the firmware image contains that header.
Reject images shorter than struct prestera_fw_header before decoding the
magic and version fields.
CSIRTS triage
- What
- The Prestera network device driver does not validate firmware header length, allowing malformed firmware to cause issues.
- Who is affected
- Systems using Marvell Prestera switch hardware with untrusted or corrupted firmware.
- Urgency
- Medium priority; not currently exploited but affects firmware upload security.
- Action
- Apply kernel patch validating firmware header length in Prestera driver or use only signed/verified firmware.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Advisory coverage (2)
- unknownCVE-2026-74693: In the Linux kernel, the following vulnerability has been resolved: net: prestera: validate fi…nvd · 2026-08-22
- mediumCVE-2026-74693: net: prestera: validate firmware header lengthmsrc · 2026-08-11
External references
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